I've been reading a variety of threads here. Here's my situation: I have recently picked up a used GK MB200 and running into an Avatar SB112 8ohm neo cab + a home brewed 1x12 ported cab with an Emi Delta Pro12a (8ohm) speaker (I lined the cab with batting which has helped control the low end). This small rig sounds good and I checked with GK (Brian) who told me it's ok to run the MB200 wide open as long as I needed and it should be fine to handle that. The only issue I have is the very lowest notes just slightly seem to overdrive the speakers so I'm working on tweaking my EQ to control the 5th string output (turned bass on MB200 all the down and rolling back bass on my Tobias Growler (gibson era), slight low mid bump and slight hi mid bump and treble mostly down). So, my question is, I want to continue this cab rig and trying to decide if I should upgrade to a more powerful amp. I'm looking at ampeg pf500 vs. GK MB500 vs. Carvin BX500. I have read of people with problems with the PF500 and BX500 cutting out and dying. So, that issue aside, I'm wondering about the volume benefits of the larger amp. I will be playing with a three piece (guitarist with DT25 combo/POD HD500 and acoustic drummer who is very good at controlling dynamics) band, mostly playing private parties. Could be indoors or outside on patios. We are all over 40yo, have played together for years, no issues with super loud guitarist, etc or stepping on each others toes volume wise The music would be classic rock, blues and some jazz stuff. I have clocked the current rig output at about 103dB at 6 feet away if that helps reference the volume I can get with the MB200 wide open. opinions? please don't anyone suggest I need a fEarful or Thunderchild, etc. I want to maintain my budget of getting a used head <$300. I like the two 1x12 approach and like the sounds of these cabs. I want a lightweight, smallish amp but just wonder if it's really worth it to upgrade the amp to a more powerful 4 ohm output. Thanks for any opinions, pro or con.